Glued steel fibres are short, high-strength steel elements temporarily bonded into small bundles with a water-soluble adhesive. I use the term “glued” to describe the delivery format, not a permanent bond inside the concrete. During mixing, the adhesive dissolves and the individual fibres separate, allowing them to distribute through the concrete matrix and help control cracking, improve post-cracking behaviour, and increase resistance to impact and abrasion.
At BEKA, we view glued steel fibres as a reinforcement component that must be selected together with the concrete mix, construction method, loading conditions, and required performance. They are commonly considered for industrial floors, precast products, tunnel linings, shotcrete, pavements, and other applications where distributed reinforcement can provide practical installation benefits. The final fibre type and dosage should always be confirmed through structural design and project testing where required.
Before mixing, glued steel fibres remain grouped in bundles, which can simplify handling and help the fibres enter the mixer in a controlled form. Once water and mixing energy act on the adhesive, the bundles separate into individual fibres. The separated fibres then become distributed throughout the concrete rather than remaining concentrated in a few locations.
After the concrete hardens, the fibres bridge cracks that begin to form under tension, bending, shrinkage, impact, or repeated loading. They do not usually prevent every crack from occurring, but they can help limit crack opening and transfer load across cracks. The actual contribution depends on fibre geometry, tensile strength, anchorage, orientation, dosage, concrete quality, and the structural design method used.
The glued format is mainly a mixing and handling solution. It can help maintain a consistent bundle form during storage and feeding while allowing individual fibres to disperse after the adhesive dissolves. This feature may be useful when a project requires steel fibres to be added efficiently to ready-mix, precast, or shotcrete production.
However, glued fibres are not automatically suitable for every mixer or mix design. I recommend checking the mixer type, mixing sequence, moisture condition, aggregate grading, and maximum fibre dosage before production. A supplier should provide handling guidance rather than assuming that one addition method works for all concrete plants.
Glued steel fibres are primarily used to improve the behaviour of concrete after cracking. Their main function is to create many small reinforcement bridges throughout the concrete volume. This distributed reinforcement can support load transfer in cracked sections and may reduce dependence on some conventional reinforcement arrangements, subject to engineering approval.
These benefits should be treated as design objectives rather than automatic guarantees. Fibre-reinforced concrete performance is affected by mixing quality, fibre orientation, concrete strength, curing, joint layout, and workmanship. For this reason, I recommend evaluating fibres using project-specific design calculations and, where appropriate, laboratory or production-scale trials.
Industrial floors are one of the most common applications because the concrete may experience forklift traffic, pallet loads, abrasion, and repeated wheel loading. Glued steel fibres can be incorporated into the slab mix to provide distributed crack control and residual capacity. Joint spacing, slab thickness, subgrade support, load transfer, and curing remain essential parts of the floor design.
Precast manufacturers may use steel fibres in panels, pipes, segments, blocks, and other products where consistent fibre addition and repeatable production are important. Fibre selection should consider mould geometry, vibration or compaction equipment, demoulding requirements, surface appearance, and the required mechanical performance. Trial batches can help confirm fibre dispersion and finishing behaviour before full production.
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Steel fibre-reinforced shotcrete is used in some tunnel and ground-support systems because fibres can provide distributed reinforcement in sprayed concrete. Glued fibres may be considered where the batching and feeding process is compatible with the shotcrete equipment. The design must account for spraying conditions, rebound, fibre orientation, layer thickness, rock or soil conditions, and the relevant project specifications.
Concrete pavements, loading yards, logistics areas, and hardstandings may benefit from fibre reinforcement when the design requires crack control and resistance to repeated service loads. Fibres are not a substitute for proper subgrade preparation or drainage. I also recommend reviewing saw-cut timing, joint design, edge conditions, and construction traffic before finalizing the specification.
Glued steel fibres are available in different material grades, lengths, diameters, profiles, and end shapes. Common options include straight fibres, hooked-end fibres, crimped fibres, and fibres with other deformations intended to improve mechanical anchorage. The best option depends on whether the project prioritizes crack control, residual strength, impact resistance, pumping behaviour, surface requirements, or ease of finishing.
As an initial reference, commonly specified steel fibre dimensions may include lengths of approximately 30–60 mm and nominal diameters of about 0.5–1.0 mm. These are indicative industry ranges, not universal specifications. Fibre geometry should be selected from the required performance and design calculation rather than from length alone.
Dosage is also project-specific. A preliminary range sometimes considered for conventional fibre-reinforced concrete is approximately 20–60 kg/m³, but the correct quantity may be lower or higher depending on the concrete design and required residual performance. I do not recommend using a standard dosage without checking the structural engineer’s requirements, mix workability, and production trial results.
| Specification | Why It Matters |
|---|---|
| Fibre length and diameter | Influence dispersion, anchorage, surface finish, and the fibre-to-aggregate relationship. |
| Shape and end configuration | Affect mechanical anchorage and post-cracking behaviour. |
| Steel grade and tensile properties | Help determine the fibre’s resistance and suitability for the design requirement. |
| Glue and bundle format | Influence handling, feeding, and separation during mixing. |
| Dosage and packaging | Support accurate batching, storage, and project logistics. |
| Compatibility with equipment | Helps reduce feeding, pumping, blockage, or finishing problems. |
I suggest beginning with the application and design requirement rather than requesting a generic “steel fibre.” Share the concrete grade, aggregate size, target dosage, slab or section thickness, mixing equipment, placement method, and expected loading conditions. This information allows a supplier to recommend a more appropriate geometry and supply format.
At BEKA, our role as a glued steel fibre manufacturer and supplier is to support the specification process with product information, application discussion, and supply coordination. We do not treat one fibre design as suitable for every project. Instead, we can review the intended application, required dimensions, packaging, quantity, and delivery expectations so that buyers can evaluate a practical supply solution.
Glued steel fibres are bundled steel fibres designed to separate during concrete mixing and distribute reinforcement throughout the finished material. They are used mainly to improve crack control, post-cracking behaviour, impact resistance, and construction efficiency in applications such as industrial floors, precast concrete, pavements, tunnels, and shotcrete.
The correct choice depends on fibre geometry, steel properties, dosage, concrete mix, placement method, and structural design. I recommend confirming the specification through technical review and trial mixing rather than selecting fibres by price or nominal length alone. For project-specific requirements, contact BEKA with your application, target quantity, dimensions, and delivery plan so we can discuss the appropriate glued steel fibre supply option.
Contact us to discuss your requirements of glued steel fibres. Our experienced sales team can help you identify the options that best suit your needs.